3Com 3CRDSF9PWR-US - OfficeConnect Managed Fast Ethernet PoE Switch User Manual - page 172
172
C
HAPTER
13: C
ONFIGURING
Q
UALITY
OF
S
ERVICE
Defining the Queue
Mode
The
Queue Setup Page
is used to set the queue mode to strict priority or
Weighted Round-Robin (WRR) for the CoS priority queues.
You can set the switch to service the queues based on a strict rule that
requires all traffic in a higher priority queue to be processed before lower
priority queues are serviced, or use Weighted Round-Robin (WRR)
queuing that specifies the relative weight of each queue. WRR uses a
predefined relative weight for each queue that determines the
percentage of time the switch services each queue before moving on to
the next queue. This prevents the head-of-line blocking that can occur
with strict priority queuing.
Monitor users have no access to this page.
To configure the queue mode:
1
Click
Device > QoS > Queue
. The
Queue Setup Page
opens:
Figure 89
Queue Setup Page
The
Queue Setup Page
contains the following fields:
■
Strict Priority
— Services the egress queues in sequential order,
transmitting all traffic in the higher priority queues before servicing
lower priority queues.
■
WRR
— Weighted Round-Robin shares bandwidth at the egress ports
by using scheduling weights 1, 2, 10, 15 for queues 0 - 3 respectively.
2
Select the queue mode.
3
Click
. The queue mode is configured on the device, and the
device is updated.